691146 has 16 divisors (see below), whose sum is σ = 1536000. Its totient is φ = 230364.

The previous prime is 691129. The next prime is 691147. The reversal of 691146 is 641196.

691146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (691147) by changing a digit.

691146 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6346 + ... + 6453.

It is an arithmetic number, because the mean of its divisors is an integer number (96000).

2⁶⁹¹¹⁴⁶ is an apocalyptic number.

691146 is an abundant number, since it is smaller than the sum of its proper divisors (844854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691146 is a wasteful number, since it uses less digits than its factorization.

691146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12810 (or 12804 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 691146 is about 831.3519110461. The cubic root of 691146 is about 88.4144533877.

The spelling of 691146 in words is "six hundred ninety-one thousand, one hundred forty-six".